Kate-- We used to carry both PG and VG in 36mg. Then our suppliers stopped offering 36, 24mg being the highest they will send. It just so happened that we had received a boatload of 36mg PG right before the change happened. So we had lots of 36mg PG but VG36 ran out quickly. We are nearly out of the Pg36 too now, and we won't be getting any more (of either) unless something changes with the rules of our suppliers.